Test-retest reliability of survey items on ownership and use of physical activity trackers
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CitationNg, Kwok W. Badura, Petr. Dzielska, Anna. Kokko, Sami. Woods, Catherine B. Hamrik, Zdenek. (2019). Test-retest reliability of survey items on ownership and use of physical activity trackers. Acta Gymnica, 49 (2) , 67-74. 10.5507/ag.2019.001.
Background: Researchers are interested in using digital tools, such as physical activity trackers (PAT), to promote and measure physical activity. PAT is a fast-growing research area that measures movement therefore, reliable questions on the ownership and use of PATs among adolescent populations need to be developed.
Objective: The aim of this study was to conduct an intra-rater test-retest reliability study on PAT survey items used for surveillance purposes among young adolescents in ownership and use of smartphone applications (apps) and heart rate monitors (HRM).
Methods: Young adolescents (N = 755; 11-, 13-, and 15-year-olds) in the Olomouc region of the Czech Republic were recruited to complete the questionnaire with a three-week gap during autumn 2017. Kappa statistics were used for measuring reliability.
Results: When items were dichotomised into owners and non-owners, there was moderate agreement for boys (apps Kappa = .563, HRM Kappa = .575) and girls (apps Kappa = .447, HRM Kappa = .443).
Conclusions: Measures in ownership and use of PAT can be assumed reliable among young adolescents.